diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 203f3c8..5acde1a 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -3,4 +3,9 @@ updates:
 - package-ecosystem: "github-actions"
   directory: "/"
   schedule:
-      interval: "weekly"
+    interval: "weekly"
+
+- package-ecosystem: "gitsubmodule"
+  directory: "/"
+  schedule:
+    interval: "monthly"
diff --git a/gitdb/ext/smmap b/gitdb/ext/smmap
index 334ef84..f1ace75 160000
--- a/gitdb/ext/smmap
+++ b/gitdb/ext/smmap
@@ -1 +1 @@
-Subproject commit 334ef84a05c953ed5dbec7b9c6d4310879eeab5a
+Subproject commit f1ace75be355fdec927793e462b9b12bf6ec9520